194819313 has 12 divisors (see below), whose sum is σ = 281278320. Its totient is φ = 119888496.

The previous prime is 194819311. The next prime is 194819323. The reversal of 194819313 is 313918491.

It is a happy number.

It is not a de Polignac number, because 194819313 - 2¹ = 194819311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (194819311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191623 + ... + 192636.

It is an arithmetic number, because the mean of its divisors is an integer number (23439860).

Almost surely, 2^194819313 is an apocalyptic number.

194819313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

194819313 is a deficient number, since it is larger than the sum of its proper divisors (86459007).

194819313 is a wasteful number, since it uses less digits than its factorization.

194819313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384288 (or 384275 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 194819313 is about 13957.7689119716. The cubic root of 194819313 is about 579.7098360334.

The spelling of 194819313 in words is "one hundred ninety-four million, eight hundred nineteen thousand, three hundred thirteen".